<template>
	<div>
		<!--面包屑导航区-->
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>商品管理</el-breadcrumb-item>
			<el-breadcrumb-item>编辑商品</el-breadcrumb-item>
		</el-breadcrumb>

		<el-card>
			<!--提示信息-->
			<el-alert title="编辑商品信息" type="info" center show-icon :closable="false"></el-alert>
			<!--步骤条-->
			<el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
				<el-step title="基本信息"></el-step>
				<el-step title="商品参数"></el-step>
				<el-step title="商品属性"></el-step>
				<el-step title="商品图片"></el-step>
				<el-step title="商品内容"></el-step>
				<el-step title="完成"></el-step>
			</el-steps>
			<!--tab标签栏-->
			<el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px" label-position="top">
				<el-tabs v-model="activeIndex" tab-position="left">
					<el-tab-pane label="基本信息" name="0">
						<el-form-item label="商品名称" prop="goods_name">
							<el-input v-model="editForm.goods_name"></el-input>
						</el-form-item>
						<el-form-item label="商品价格" prop="goods_price">
							<el-input v-model="editForm.goods_price" type="number"></el-input>
						</el-form-item>
						<el-form-item label="商品重量" prop="goods_weight">
							<el-input v-model="editForm.goods_weight" type="number"></el-input>
						</el-form-item>
						<el-form-item label="商品数量" prop="goods_number">
							<el-input v-model="editForm.goods_number" type="number"></el-input>
						</el-form-item>
						<el-form-item label="商品分类">
							<el-cascader v-model="editForm.goods_cat" :options="cateList" :props="cascaderProps" style="width: 300px" disabled></el-cascader>
						</el-form-item>
					</el-tab-pane>
					<el-tab-pane label="商品参数" name="1">
						<el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
							<el-checkbox-group v-model="item.attr_value">
								<el-checkbox :label="cb" v-for="(cb,index) in item.attr_vals" :key="index" border></el-checkbox>
							</el-checkbox-group>
						</el-form-item>
					</el-tab-pane>
					<el-tab-pane label="商品属性" name="2">
						<el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
							<el-input v-model="item.attr_vals"></el-input>
						</el-form-item>
					</el-tab-pane>
					<el-tab-pane label="商品图片" name="3">
						<el-upload action="http://127.0.0.1:8888/api/private/v1/upload" :on-preview="handlePreview" :file-list="imgList"
						           :on-remove="handleRemove" list-type="picture" :headers="headerObj" :on-success="handleSuccess">
							<el-button type="primary">点击上传</el-button>
						</el-upload>
					</el-tab-pane>
					<el-tab-pane label="商品内容" name="4">
						<quill-editor v-model="editForm.goods_introduce"></quill-editor>
						<el-button type="primary" class="btnEdit" @click="postEdit">编辑商品</el-button>
					</el-tab-pane>
				</el-tabs>
			</el-form>
		</el-card>

		<!--图片预览-->
		<el-dialog title="图片预览" width="50%" :visible.sync="previewDialogVisible">
			<!--内容主体-->
			<img :src="previewPath" alt="" class="previewImg">
		</el-dialog>
	</div>
</template>

<script>
import axios from 'axios'
export default {
    name: "Edit",
    data() {
        return {
            cateList: [],
            //指定级联选择器的配置对象
            cascaderProps: {
                expandTrigger: 'hover',
                value: 'cat_id',
                label: 'cat_name',
                children: 'children'
            },
            activeIndex: '0',
            editForm: {
                goods_name: '',
                goods_price: 0,
                goods_weight: 0,
                goods_number: 0,
                goods_cat: [],
                pics: [],
                goods_introduce: '',
                attrs: []
            },
            editFormRules: {
                goods_name: [
                    {required: true, message: '请输入商品名称', trigger: 'blur'}
                ],
                goods_price: [
                    {required: true, message: '请输入商品价格', trigger: 'blur'}
                ],
                goods_weight: [
                    {required: true, message: '请输入商品重量', trigger: 'blur'}
                ],
                goods_number: [
                    {required: true, message: '请输入商品数量', trigger: 'blur'}
                ]
            },
            //商品参数列表
            manyTableData: [],
            //商品属性列表
            onlyTableData: [],
            //已上传图片列表
            imgList: [],
            //待上传图片列表
            tmpImgList: [],
            //图片上传请求头
            headerObj: {
                Authorization: window.sessionStorage.getItem('token')
            },
            //预览图片url
            previewPath: '',
            //图片预览对话框显示状态
            previewDialogVisible: false
        }
    },
    created() {
        this.getCateList()
        this.getGoodsInfo()
    },
    methods: {
        //获取商品信息
        getGoodsInfo() {
            axios.get(`goods/${this.$route.params.id}`).then(response => {
                const res = response.data
                if (res.meta.status === 200) {
                    this.editForm = res.data
                    // split 得到的字符数组不能绑定到级联选择器，用map转数字数组  ['1','3','6'] => [1,3,6]
                    this.editForm.goods_cat = this.editForm.goods_cat.split(',').map(Number)
                    this.getAttrData()
                    this.getImgList()
                } else {
                    this.$message.error(res.meta.msg)
                }
            }).catch(() => {
                this.$message.error("请求失败")
            })
        },
        //获取商品分类数据
        getCateList() {
            axios.get('categories').then(response => {
                const res = response.data
                if (res.meta.status === 200) {
                    this.cateList = res.data
                } else {
                    this.$message.error(res.meta.msg)
                }
            }).catch(() => {
                this.$message.error('请求失败')
            })
        },
        getAttrData() {
            //处理商品参数数据
            this.editForm.attrs.forEach(item => {
                if (item.attr_sel === 'many') {
                    //全部参数
                    item.attr_vals = item.attr_vals ? item.attr_vals.split(',') : []
                    //已选参数
                    item.attr_value = item.attr_value ? item.attr_value.split(',') : []
                    this.manyTableData.push(item)
                } else if (item.attr_sel === 'only') {
                    this.onlyTableData.push(item)
                }
            })
        },
        getImgList() {
            this.editForm.pics.forEach(item => {
                this.imgList.push({
                    name: item.pics_id,
                    url: item.pics_big_url,
                    pic: item.pics_big
                })
            })
        },
        //图片预览
        handlePreview(file) {
            this.previewPath = file.url
            this.previewDialogVisible = true
        },
        //移除图片
        handleRemove(file) {
            if (file.response) {
                const filePath = file.response.data.tmp_path
                const i = this.tmpImgList.findIndex(x => x.pic === filePath)
                this.tmpImgList.splice(i, 1)
            } else {
                const filePath = file.pic
                const i = this.imgList.findIndex(x => x.pic === filePath)
                this.imgList.splice(i, 1)
            }
        },
        //图片上传成功hook
        handleSuccess(response) {
            if (response.meta.status === 200) {
                this.$message.success(response.meta.msg)
                this.tmpImgList.push({pic: response.data.tmp_path})
            } else {
                this.$message.error(response.meta.msg)
            }
        },
        //提交编辑商品
        postEdit() {
            this.$refs.editFormRef.validate(valid => {
                if (valid) {
                    /*let pics = []
                    this.imgList.forEach(item => {
                        pics.push({pic: item.pic})
                    })
                    pics.push(...this.tmpImgList)*/
                    const form = {
                        goods_name: this.editForm.goods_name,
                        goods_price: this.editForm.goods_price,
                        goods_number: this.editForm.goods_number,
                        goods_weight: this.editForm.goods_weight,
                        goods_introduce: this.editForm.goods_introduce,
                        // pics: pics,
                        attrs: [],
                        goods_cat: ''
                    }
                    form.goods_cat = this.editForm.goods_cat.join(',')
                    //处理商品参数
                    this.manyTableData.forEach(item => {
                        const newInfo = {
                            attr_id: item.attr_id,
                            attr_value: item.attr_value.join(',')
                        }
                        form.attrs.push(newInfo)
                    })
                    //处理商品属性
                    this.onlyTableData.forEach(item => {
                        const newInfo = {
                            attr_id: item.attr_id,
                            attr_value: item.attr_vals
                        }
                        form.attrs.push(newInfo)
                    })
                    axios.put(`goods/${this.editForm.goods_id}`, form).then(response => {
                        const res = response.data
                        if (res.meta.status === 200) {
                            this.$message.success(res.meta.msg)
                            this.$router.push('/goods')
                        } else {
                            this.$message.error(res.meta.msg)
                        }
                    }).catch(() => {
                        this.$message.error('操作失败')
                    })
                } else {
                    return this.$message.error('请填写必要的表单项')
                }
            })
        }
    }
}
</script>

<style lang="less" scoped>

</style>